Abstract

We numerically analyze phase-sensitive parametric amplification and de-amplification of a multimode field representing a multi-pixel text image. We optimize pumping configuration and demonstrate that ~10-dB gain is achievable with relatively moderate ~10-kW total pump peak power available from compact pump sources.

Intensity of the text image before (a, b) and after (c, d, e) phase-sensitive amplification. Vertical scale is linear and is normalized by the peak intensity of the input image. (b) and (d) are the top views of (a) and (c), respectively. (e) is the front-side view of (c).

(a) Intensity of the text image processed by the modified PSF (without the delta-function), i.e. amplified by transfer function (|µ|-iν-1) in the spatial frequency domain; (b) and (c) are the top and front-side views of (a). Vertical scale is linear and is normalized by the peak intensity of the input image.

Same input image as that in Fig. 4, but processed by the complete PSF (with the delta-function), i.e. amplified by transfer function (|µ|-iν) in the spatial frequency domain; (b) and (c) are the top and front-side views of (a). Vertical scale is linear and is normalized by the peak intensity of the input image.